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Crop Guide: Plant Care & Fertigation

Index

  1. Open-field using granular N-P-K fertilizers
  2. Open-field using fully water soluble N-P-K fertilizers and fertigation setup
  3. Nutrigation™ (fertigation)*
  4. Greenhouse and tunnels
  5. Nutrigation™ (fertigation) – by QUANTITIVE* delivery
  6. Nutrigation™ (fertigation) – by PROPORTIONAL* delivery
  7. Soilless grown
  8. Haifa NutriNet™ web software for Nutrigation™ programs
  9. Open-field grown cucumbers on loam (medium) texture soil
  10. Open-field grown cucumbers, for processing, on clay (heavy) texture soil
  11. Tunnel grown cucumbers on loam (medium) texture soil
  12. Greenhouse grown cucumbers on sandy (light) texture soil

 

5.1 Fertilizers recommendations for a variety of growth conditions

5.1.1 Open-field using granular N-P-K fertilizers

Plant density: 30,000 – 40,000 / ha

Expected yield: 25 – 35 ton / ha

 

 

 

Pre-plant application

Nutrient Demand(kg/ha)*

Suggested Fertilizers(kg/ha)*

N

P2O5

K2O

MgO

AN

SSP

SOP

MgSO4

85

150

270

50

256

750

540

300

AN = Ammonium Nitrate (33.5-0-0)

SSP = Single Super Phosphate (0-20-0)

SOP = Sulfate of Potash (0-0-50)

*CaO = may be required if soil and water are low in calcium

 

 

Side dressing

Table 5.1: Nutrients demand and recommended fertilizers for side-dressing of open-field cucumbers

Growth stage

Nutrient Demand(kg/ha/stage)

Recommended Granular

N-P-K-Mg Fertilizers (kg/ha/stage)

N

P2O5

K2O

MgO

18-18-18

20-3-20

12-0-42+4MgO

Vegetative development

50

50

50

5

280

-

-

Flowering –

fruit-set

50

10

50

0

-

250

-

Production

70

0

230

20

-

-

2 x 275*

Total

170

60

330

25

280

250

550

*2 applications of 275 kg/ha each, at 10 days interval.

 

5.1.2 Open-field using fully water soluble N-P-K fertilizers and fertigation setup

Plant density: 30,000 – 40,000 / ha

Expected yield: 40 – 50 ton / ha

 

When fields are equipped with fertigation setup, Nutrigation™ (fertigation) is recommended (for details see the relevant paragraph on page 21). When fertilizers are properly soil applied and Nutrigated, the expected yield may be increased by app. 80% as compared to the application of granular fertilizers, to around 40 – 50 t/ha.

 

 

Pre-plant application

Nutrient Demand(kg/ha)

Suggested Fertilizers(kg/ha)

N

P2O5

K2O

AN

SSP

SOP

60

160

200

180

800

400

AN = Ammonium Nitrate (33.5-0-0), SSP = Single Super Phosphate (0-20-0),

SOP = Sulfate of Potash (0-0-50),

CaO = may be required if soil and water are low in calcium.

 

Nutrigation™ (fertigation)*

Table 5.2: Nutrients demand and recommended fertilizers for Nutrigation™ of open-field cucumbers

Growth stage Nutrient Demand (kg/ha/stage) Recommended Fertilizers (kg/ha/stage)
N P2O5 K2O MgO Multi-K Haifa MAP AN Magnisal
Vegetative development 40 10 60 10 130 16 42 60
Flowering –Fruit-set 70 20 140 40 300 33 - 250
Production 80 20 200 30 430 33 - 190
Total 190 50 400 80 860 82 42 500

*The fertilizers should be applied every 1 – 2 irrigation cycles.

 

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MAP™ = Mono-ammonium Phosphate, technical grade (12-61-0),

AN = Ammonium Nitrate (33.5-0-0),

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

CaO = may be required if soil and water are low in calcium.

 

5.1.3 Greenhouse and tunnels

A – Soil grown

Plant density: 18,000 – 24,000 / ha

Expected yield: 120 – 150 ton / ha

Total nutrients application(kg/ha)

N

P2O5

K2O

MgO

300

240

700

100

CaO = may be required if soil and water are low in calcium

 

 

Pre-plant application

Nutrient demand(kg/ha)

Suggested fertilizers(kg/ha)

N

P2O5

K2O

AN

SSP

SOP

60

160

200

180

800

400

AN = Ammonium Nitrate (33.5-0-0), SSP = Single Super Phosphate (0-20-0),

SOP = Sulfate of Potash (0-0-50),

CaO = may be required if soil and water are low in calcium.

 

i. Nutrigation™ (fertigation) – by QUANTITIVE* delivery

Table 5.3: Nutrients demand and recommended fertilizers for quantitative Nutrigation™ of soil-grown, greenhouse cucumbers

Growth stage

Nutrient Demand(kg/ha/stage)

Recommended Fertilizers(kg/ha/stage)

N

P2O5

K2O

MgO

Multi-K™

Haifa MAP™

AN

Magnisal™

Establishment

40

10

60

10

130

16

42

60

Vegetative development

70

20

140

40

300

33

-

250

Flowering – fruit-set

80

200

200

30

430

33

-

190

Production

50

20

100

20

215

33

-

190

Total

240

70

500

100

1075

115

42

690

*The application rate is based and a quantity per area regardless of the concentration in the irrigated water.

The fertilizers should be applied every 1-2 irrigation cycles.

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MAP™ = Mono-ammonium Phosphate (12-61-0),

AN = Ammonium Nitrate (33.5-0-0),

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

 

 

Calcium

In case of soils low in calcium this plant nutrient should be applied from fruit-set until the end of harvest. Rates should be adjusted according to the concentration in the soil and irrigation water.

Total requirement rate = 2–4 kg/ha/day CaO, which can be applied as 11.5 kg/ha/day of Haifa Cal™ 15.5-0-0-26CaO.

 

ii. Nutrigation™ (fertigation) – by PROPORTIONAL* delivery

Table 5.4: Nutrients demand and recommended fertilizers for proportional Nutrigation™ of soil-grown, greenhouse cucumbers

Growth stage

Assumptions

Nutrient Demand(kg/m3)

Recommended  Fertilizers(kg/m3)

No. of days/

stage

Irrigation rate (m3/ha/day)

N

P2O5

K2O

MgO

Multi-K™

Haifa MAP™

AN

Magnisal™

Establishment

25

25

0.06

0.02

0.10

0.02

0.21

0.03

0.07

0.1

Vegetative development

30

40

0.06

0.02

0.12

0.03

0.25

0.03

0

0.21

Flowering – fruit-set

30

55

0.05

0.01

0.12

0.02

0.26

0.02

0

0.12

Production

25

60

0.03

0.01

0.07

0.01

0.14

0.02

0

0.13

*The concentration of applied plant nutrients is unchanged and is constant during the entire irrigation cycle.

The fertilizers should be applied every 1 – 2 irrigation cycles

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MAP™ = Mono-ammonium Phosphate (12-61-0),

AN = Ammonium Nitrate (33.5-0-0),

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

CaO may be required if soil and water are low in calcium.

 

B - Soilless grown

Cucumber can be grown in greenhouses on soilless media, such as perlite, Rockwool, peat, etc. When growing cucumbers on soilless media, special care must be taken in monitoring the nutrients that the crop receives, as there is no soil to compensate for the spent nutrients.

 

The following factors should be taken in account:

  • pH: The pH in the nutrient solution should be maintained at 5.5 – 6.5. The pH can be lowered by the use of acids. Adjustment of pH levels can be accomplished by slight changes in nitrate/ammonium ratio in the nutrient solution.
  • Electrical Conductivity (EC): The EC of the nutrient solution and the root zone should not exceed 2.2 and 3.0 dS/m, respectively. The difference between the EC of the nutrient solution and the drain water should not exceed 1.5 – 2.0 dS/m (depending on the properties of the water supply).
  • Nitrate (NO3): The level of nitrate in the drain water should be 200 – 300 ppm depending on the nitrate level, which changes according the growth stage.
  • Nitrate/Ammonium ratio should not be lower than 5:1.
  • Nitrite (NO2): The level of nitrite should be zero, because its presence in the growth medium impairs root functioning.
  • Ammonia (NH3) and ammonium (NH4): high level of either ammonia or ammonium interferes with the ability of the roots to absorb K.


Figure 5.1: Crop Load on Beit Alpha Cucumber (cv. Sarig), in greenhouse cucumbers.

 

 

Table 5.5: Nutrition database for greenhouse-grown cucumbers under Dutch growing conditions:

Parameter

Concentration

Rockwool

Rockwool

(reuse drainage)

Plant – dry matter (7-8%)

Nutrient Solution

Root Environ.

Nutrient Solution

Root Environ.

Guiding Range

Deficient

Excessive

EC (mS/cm)

2.2

3.0

1.7

3.0

 

 

 

 

Concentration (mg/l)

(%)

NH4

22.5

< 9.0

18.0

< 9.0

 

 

 

K in sap

 

 

 

 

0.59 –0.63

< 0.18

 

K

312.8

312.8

254.2

312.8

3.13 – 3.91

< 2.35

 

Ca

160.4

260.7

110.3

260.7

2.41 – 3.21

< 1.20

 

Mg

33.4

72.9

24.3

72.9

0.36 – 0.73

< 0.37

 

N, total

 

 

 

 

4.20 – 5.60

 

 

NO3

992.0

1116.0

728.5

1116.0

1.86

 

 

S, total

 

 

 

 

0.32

 

 

SO4

132.1

336.4

96.1

336.4

 

 

 

P

 

 

 

 

0.62 – 0.93

< 0.47

 

H2PO4

121.3

87.3

121.3

87.3

 

 

 

Si

21.1

16.9

21.1

16.9

 

 

 

Na

 

 

 

 

0.06 – 0.07

 

 

 

Concentration mg/L or ppm)

mg/Kg (ppm)

Fe

0.838

0.838

0.838

1.396

83.8 – 111.7

 

 

Mn

0.549

0.385

0.549

0.385

54.9 – 164.8

 

> 549.3*

Zn

0.327

0.458

0.327

0.458

49.0 – 143.8

< 26.1

 

B

0.270

0.054

0.270

0.540

54.0 – 75.6

< 43.2

> 108.0

Cu

0.048

0.095

0.048

0.095

10.2

< 8.9**

 

Mo

0.048

-

0.048

-

0.96 – 9.59

< 0.29

 

*in old leaves

**in young leaves; in old leaves deficient at Cu < 5.08 mg/kg DM

Important note: The above-mentioned database was prepared to fit Dutch conditions. Minor modifications may be required to correspond to your local conditions.

 

 

Table 5.6: Fertigation of soilless grown cucumbers during establishment to flowering stage

Growth stage

 

Establishment – Flowering

Nutrients concentration in the irrigation water(g/m3=ppm)

Recommended fertilizers

(g/m3)

N*

P

K

Ca

Mg

Multi-K™

Haifa MKP™

AN

CN

Magnisal™

Requirement

150

45

220

100

40

 

 

 

 

 

Contents in water**

-

-

-

100

20

 

 

 

 

 

Addition by fertilizers

150

45

220

-

20

420

200

220

-

210

* 80-90% as NO3-, 10-20% as NH4+

**Based on content in irrigation water 100 ppm Ca and 20 ppm Mg.

 

 

Table 5.7: Soilless fertigation of cucumbers during fruit-set to production stage

Growth stage

Fruit-set – Production

Nutrients concentration in the irrigation water(g/m3=ppm)

Recommended fertilizers

(g/m3)

N*

P

K

Ca

Mg

Multi-K™

Haifa MKP™

AN

CN

Magnisal™

Requirement

200

50

330

140

70

 

 

 

 

 

Content in water**

-

-

-

100

20

 

 

 

 

 

Addition by fertilizers

200

50

300

40

50

690

220

100

210

400

* 80-90% as NO3-, 10-20% as NH4+

** Based on content in irrigation water 100 ppm Ca and 20 ppm Mg.

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MKP™ = Mono Potassium Phosphate (0-52-34),

AN = Ammonium Nitrate (33.5-0-0),

Haifa Cal™ = Calcium Nitrate (15.5-0-0-26CaO)

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

Micronutrients should be maintained at the following levels (ppm) throughout the growth period:

 

 

Fe

Mn

Zn

Cu

B

Mo

(ppm = g / m3)

0.9

0.55

0.32

0.05

0.25

0.05

 

5.2 Haifa NutriNet™ web software for Nutrigation™ programs

Use the NutriNet™ web software, accessible through our website or directly

at www.haifa-nutrinet.com to assist you in working out the recommended fertilizer rates at different growth stages according to the expected yield under your growing conditions.

 

The following are examples of recommendations for cucumbers grown in different soils and growing methods, as determined by NutriNet™:

A – Open-field grown cucumbers on loam (medium) texture soil

The expected yield is 40 t/ha. Irrigated by drip and the fertilizer application method is:base-dressing followed by side-dressing.

 

At the first stage, NutriNet™ presents the removed plant nutrients by the crop and the recommended application rates based on the expected yield and the selected growing method (Table 5.8):

  • Growth method: Open field
  • Soil type: loam
  • Expected yield: 40 t/ha

 

 

Table 5.8: Nutrient requirements and recommended plant nutrient rates of cucumbers grown in loam soil with expected yield of 40 t/ha

 

Plant Nutrient Requirements(kg/ha)

N

P2O5

K2O

CaO

MgO

Removal by yield

44

20

80

10

8

Uptake by the whole plant

144

62

257

194

46

Recommended rates

173

180

334

97

46

Adjusted rates to loam soil

158

180

360

97

46

The next step allows selecting the methods of irrigation and fertilization. In the following example, the irrigation is by drip system and the fertilization by applying base-dressing followed by side-dressing (Tables 5.9, 5.10 and 5.11).

 

 

Table 5.9: Recommended base-dressing + side-dressing plant nutrient rates on irrigated crop by drip

 

N

P2O5

K2O

CaO

MgO

Adjusted rates to loam soil

158

180

360

97

46

Base dressing (kg/ha)

47

108

144

78

37

Side dressing (kg/ha)

133

86

259

23

11

Total (kg/ha)*

180

194

403

101

48

*The values in this field take into account the inefficiency factors involved in base- and side-dressings.

 

 

Table 5.10: Suggested base-dressing fertilizers* rates to supply the recommended plant nutrients at expected yield of 40 t/ha cucumbers. The N-P-K-Ca-Mg are applied at 30-60-40-80-80%, respectively.

 

Suggested base dressing fertilizers

Fertilizers

(kg/ha)

Plant nutrients (kg/ha)

N

P2O5

K2O

CaO

MgO

47

108

144

78

37

Ammonium nitrate (34%)

142

47

 

 

 

 

Superphosphate (25%)

432

 

108

 

 

 

Potassium sulfate (50%)

288

 

 

144

 

 

Dolomite (26%)

300

 

 

 

78

 

Magnesium sulfate (16%)

231

 

 

 

 

37

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.11: Suggested side-dressing fertilizers* rates to supply the recommended plant nutrients at

Suggested side dressing fertilizers

Fertilizers

(kg/ha)

Plant nutrients (kg/ha)

N

P2O5

K2O

CaO

MgO

133

86

259

23

11

Ammonium nitrate (34%)

141

133

 

 

 

 

Superphosphate (45%)

191

 

86

 

 

 

Multi-K (46%)

563

 

 

259

 

 

Calcium nitrate (26%)

88

 

 

 

23

 

Magnesium sulfate (16%)

69

 

 

 

 

11

*Other fertilizers of choice may be exchanged to supply the recommended plant nutrients.

 

B – Open-field grown cucumbers, for processing, on clay (heavy) texture soil

The expected yield is 80 t/ha. Irrigated by drip and the fertilizer application method is:

base-dressing followed by Nutrigation™ (fertigation).

  • Growth method: Open field
  • Soil type: clay
  • Expected yield: 80 t/ha

 

 

Table 5.12: Nutrient requirements and recommended plant nutrient rates of cucumbers, grown on clay soil with expected yield of 80 t/ha

 

 

Nutrient requirements(kg/ha)

N

P2O5

K2O

CaO

MgO

Removed by yield

88

40

160

20

16

Uptake by the whole plant

239

104

427

299

74

Recommended rates

287

231

555

150

74

Adjusted rates to clay soil *

263

231

598

150

74

The next step allows selecting the type of irrigation and fertilization method. In the following example, the irrigation is by drip system followed by Nutrigation™ (fertigation) (Tables 5.13, 5.14, 5.15, 5.16 and 5.17).

 

 

Table 5.13: Recommended base-dressing and side-dressing plant nutrient rates on cucumbers crop irrigated by drip

 

N

P2O5

K2O

CaO

MgO

NPK required (kg/ha)

263

231

598

150

74

Base dressing (kg/ha) *

79

139

239

120

59

Nutrigation(fertigation) (kg/ha) **

184

92

359

30

15

Total (kg/ha) ***

263

231

598

150

74

* The N-P-K-Ca-Mg are applied at 30-60-40-80-80%, respectively.

** The N-P-K-Ca-Mg are applied at 70-40-60-20-20%, respectively.

***The values in this field take into account the efficiency involved in base dressings + Nutrigation™.

 

 

Table 5.14: Suggested base-dressing fertilizers* rates to supply the recommended plant nutrients

Suggested base dressing fertilizers

Fertilizers

(kg/ha)

Plant nutrients (kg/ha)

N

P2O5

K2O

CaO

MgO

79

139

239

120

59

Ammonium nitrate (34%)

239

79

 

 

 

 

Superphosphate (25%)

556

 

139

 

 

 

Potassium sulfate (50%)

478

 

 

239

 

 

Dolomite (26%)

462

 

 

 

120

 

Magnesium sulfate (16%)

369

 

 

 

 

59

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.15: Suggested Nutrigation™ fertilizers* rates supplying the recommended plant nutrients at expected yield of 80 t/ha

Suggested Nutrigation (fertigation) fertilizers

Fertilizers

(kg/ha)

Plant nutrients (kg/ha)

N

P2O5

K2O

CaO

MgO

184

92

359

30

15

Ammonium nitrate (33%)

112

36.8

 

 

 

 

Haifa MAP (12-61-0)

151

18.1

92

 

 

 

Multi-K (13-0-46)

780

101.5

 

359

 

 

Haifa Cal (26%)

115

17.3

 

 

30

 

Magnesium sulfate (16% MgO)

94

 

 

 

 

15

TOTAL

1,252

184

92

359

30

15

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.16: Plant nutrients distribution at the various growing stages by fertigation

 

Nutrigation (kg/phase/ha)

Growth stage

N

P2O5

K2O

CaO

MgO

Planting

1

0

1

0

0

1st growth

13

6

25

2

1

Main season

107

54

209

17

9

End season

100

50

196

16

8

TOTAL

221

110

431

35

18

Kg suggested *

184

92

359

30

15

*The values in this fields take into account the efficiency involved in Nutrigation™.

 

 

Growthstage

Fertilizer

1

kg

Fertilizer

2

kg

Fertilizer

3

kg

Fertilizer

4

kg

Fertilizer

5

kg

planting

A.N.

2

no fert.

0

multi-K

2

no fert.

0

no fert.

0

1st growth

A.N.

11

MAP

10

multi-K

54

C.N.

8

Mg(SO4)2

6

main season

A.N.

81

MAP

89

Multi-K

454

C.N.

65

Mg(SO4)2

56

end season

A.N.

75

MAP

82

Multi-K

426

C.N.

62

Mg(SO4)2

50

A.NAmmonium nitrate (34%)

Haifa MAP™ MAP (12-61-0)

Multi-K™ = Potassium nitrate (13-0-46)

C.N. Calcium nitrate (26% CaO)

Mg (SO4)Magnesium sulfate (16% MgO)

 

C – Tunnel grown cucumbers on loam (medium) texture soil

The expected yield is 120 t/ha. Irrigated by drip and the fertilizer application method is by based dressing followed by Nutrigation™ (fertigation).

  • Growth method: Tunnel
  • Soil type: loam
  • Expected yield: 120 t/ha

 

 

Table 5.18: Nutrient requirements and recommended plant nutrient rates of cucumbers grown in clay soil with expected yield of 120 t/ha

 

Nutrient Requirements(kg/ha)

N

P2O5

K2O

CaO

MgO

Removed by yield

132

60

240

30

24

Uptake by the whole plant

323

141

578

382

97

Recommended rates

388

275

751

191

97

Adjusted rates to loam soil

355

275

809

191

97

The next step allows selecting the type of irrigation and fertilization method. In the following example, the irrigation is by drip system also used for Nutrigation™ (fertigation) (Tables 5.19, 5.20, 5.21, 5.22 and 5.23).

 

 

Table 5.19: Recommended base-dressing and side-dressing plant nutrient rates on cucumber crop

 

N

P2O5

K2O

CaO

MgO

NPK required (kg/ha)

355

275

809

191

97

Base dressing (kg/ha) *

107

165

324

153

78

Nutrigation(fertigation) (kg/ha) **

248

110

485

38

19

Total (kg/ha) ***

355

275

809

191

97

* The N-P-K-Ca-Mg are applied at 30-60-40-80-80%, respectively.

** The N-P-K-Ca-Mg are applied at 70-40-60-20-20%, respectively.

***The values in this field take into account the efficiency involved in base dressings + Nutrigation™.

 

 

Table 5.20: Suggested base-dressing fertilizer* rates to supply the recommended plant nutrients

Suggested base dressing fertilizers

Fertilizers

kg/ha

Plant nutrients (kg/ha)

N

P2O5

K2O

CaO

MgO

107

165

324

153

78

Ammonium nitrate (34%)

324

107

 

 

 

 

Superphosphate (25%)

660

 

165

 

 

 

Potassium sulfate (50%)

648

 

 

324

 

 

Dolomite (26%)

588

 

 

 

153

 

Magnesium sulfate (16%)

488

 

 

 

 

78

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.21: Suggested Nutrigation™ fertilizer* rates supplying the recommended plant nutrients at expected yield of 120 t/ha

Suggested Nutrigation (fertigation) fertilizers

Fertilizers

kg/ha

Plant nutrients (kg/ha)

N

P2O5

K2O

CaO

MgO

248

110

485

38

19

Ammonium nitrate (33%)

165

54.3

 

 

 

 

Haifa MAP™ (12-61-0)

180

21.6

 

 

 

 

Multi-K ™(13-0-46)

1,054

137.1

 

485

 

 

Haifa cal ™(26%)

146

21.9

 

 

38

 

Magnesium sulfate (16% MgO)

119

 

 

 

 

19

TOTAL

1,664

248

110

485

38

19

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.22: Fertigation rates of plant nutrients at the various growing stages

Growth stage

N

P2O5

K2O

CaO

MgO

Planting

1

0

2

0

0

1st growth

17

8

34

3

1

Main season

144

64

282

22

11

End season

135

60

265

21

10

TOTAL

297

132

583

46

22

Kg suggested

248

110

485

38

19

 

 

Table 5.23: Suggested fertigation fertilizers rates at various growing stages of tunnel grown cucumbers

Growthstage

Fertilizer

1

kg

Fertilizer

2

kg

Fertilizer

3

kg

Fertilizer

4

kg

Fertilizer

5

kg

 planting

A.N.

1

no fert.

0

Multi-K™

4

no fert.

0

no fert.

0

 1st growth

A.N.

12

Haifa MAP™

13

Multi-K™

74

C.N.

12

Mg(SO4)2

6

 main season

A.N.

115

Haifa MAP™

105

Multi-K™

613

C.N.

85

Mg(SO4)2

69

 end season

A.N.

106

Haifa MAP™

98

Multi-K™

576

C.N.

81

Mg(SO4)2

63

A.N. = Ammonium nitrate (34%)

Haifa MAP™ = MAP (12-61-0)

Multi-K™ = Potassium nitrate (13-0-46)

C.N. = Calcium nitrate (26% CaO)

Mg (SO4)= Magnesium sulfate (16% MgO)

 

D – Greenhouse grown cucumbers on sandy (light) texture soil

The expected yield is 300 t/ha. Irrigated by drippers that serve also for fertilizer application by Nutrigation™ (fertigation).

  • Growth method: Greenhouse
  • Soil type: sandy
  • Expected yield: 300 t/ha

 

 

Table 5.24: Nutrient requirements and recommended plant nutrient rates of cucumbers grown in sandy soil with expected yield of 300 t/ha

 

Nutrient requirements(kg/ha)

N

P2O5

K2O

CaO

MgO

Removal by yield

330

150

600

75

60

Uptake by the whole plant

667

293

1,197

698

190

Recommended rates

800

458

1,556

349

190

Adjusted rates to soil type (sand)

800

458

1,556

349

190

The next step allows selecting the irrigation and fertilization methods. In the following example, the irrigation is by drip system that is also used for Nutrigation™ (fertigation) (Tables 5.25, 5.26, 5.27 and 5.28).

 

 

Table 5.25: Recommended nutrients rates applied by Nutrigation™

 

N

P2O5

K2O

CaO

MgO

NPK required (kg/ha)

800

458

1,556

349

190

Nutrigation– Fertigation (kg/ha)

800

458

1,556

349

190

Total (kg/ha)

800

458

1,556

349

190

 

 

Table 5.26: Suggested fertilizer* rates supplying the recommended plant nutrients at expected yield of 300 t/ha

Suggested Nutrigation (fertigation) fertilizers

Fertilizers

(kg/ha)

Plant nutrients (kg/ha)

N

P2O5

K2O

CaO

MgO

800

458

1,556

349

190

Ammonium nitrate (33%)

0

0

 

 

 

 

Haifa MAP™ (12-61-0)

751

90

58

 

 

 

Multi-K™ (13-0-46)

3,383

439.7

 

1,556

 

 

Haifa Cal ™(26%)

1,342

201.3

 

 

349

 

Magnesium sulfate (16% MgO)

1,188

 

 

 

 

190

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.27: Plant nutrient fertigation rates at the various growth stages

Growth stage

N

P2O5

K2O

CaO

MgO

Planting

3

2

6

1

1

1st growth

60

32

108

24

13

Main season

502

266

905

203

111

End season

470

250

849

190

104

TOTAL

1,035

550

1,868

418

229

Kg suggested

800

458

1,556

349

190

 

 

Table 5.28: Suggested fertigation fertilizers rates at the various growth stages of greenhouse-grown cucumbers

Growthstage

Fertilizer

1

kg

Fertilizer

2

kg

Fertilizer

3

kg

Fertilizer

4

kg

Fertilizer

5

kg

 planting

A.N.

1

no fert.

3

 

13

no fert.

4

no fert.

6

 1st growth

A.N.

27

Haifa-MAP

52

Multi-K

235

C.N.

92

Mg(SO4)2

81

 main season

A.N.

226

Haifa-MAP

436

Multi-K

1967

C.N.

781

Mg(SO4)2

694

 end season

A.N.

0

Haifa-MAP

410

Multi-K

1846

C.N.

731

Mg(SO4)2

6650

A.N. = Ammonium nitrate (34%)

Haifa MAP™ = MAP (12-61-0)

Multi-K™ = Potassium nitrate (13-0-46)

C.N. = Calcium nitrate (26% CaO)

Mg(SO4)= Magnesium sulfate (16% MgO)

 

Fertilization and fertigation rates may vary according to cultivar, growing method, climatic conditions, growth stages and expected yield. By using Haifa NutriNet™ (http://www.haifa-nutrinet.com/) program on-line, you may obtain Haifa’s recommendations most suitable to your growing conditions by selecting the expected yield, growing method and growth stages.

 

 Need more information about growing cucumbers? You can always return to the cucumber fertilizer & cucumber crop guide table of contents